condition mean min max ZT0-3 0.03645035 0.00952905 0.05998445 ZT4-7 0.09460460000000001 0.09460460000000001 0.09460460000000001 ZT8-11 0.029395950000000004 0.029395950000000004 0.029395950000000004 ZT12-15 0.0660684 0.050376500000000005 0.08176030000000001 ZT16-19 0.1669835 0.1669835 0.1669835 ZT20-23 0.063431 0.063431 0.063431